package com.atguigu.gulimallcart.controller;

import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.gulimallcart.interceptor.CartInterceptor;
import com.atguigu.gulimallcart.service.CartService;
import com.atguigu.gulimallcart.vo.Cart;
import com.atguigu.gulimallcart.vo.CartItem;
import com.atguigu.gulimallcart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    CartService cartService;

    @GetMapping("/currentUserItems")
    @ResponseBody
    public List<CartItem> getCurrentUserItems(){

        return cartService.getUserCartItems();
    }

    @GetMapping("deleteItem")
    public String deleteItem(@RequestParam("skuId")Long skuId){

        cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId")Long skuId,
                            @RequestParam("num")Integer num){
        cartService.changeItemCount(skuId,num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,
                             @RequestParam("check") Integer check){
        cartService.checkItem(skuId,check);

        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 浏览器有一个cookie：user-key：标识用户身份，一个月后过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的购物车身份：
     * 浏览器以后保存，每次访问都会带上一个cookie：
     * <p>
     * 登录：session有
     * 没登录，按照cookie里面带来user-key来做。
     * 第一次：如果没有临时用户，帮忙创建一个临时用户
     *
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

        //1、快速得到用户信息，id,user-key
        Cart cart=cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     *
     *  ra.addFlashAttribute();将数据放在session里面，可以在页面取出，但是只能取一次
     *  ra.addAttribute();将数据放在url后面
     *
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId,
                            @RequestParam("num") Integer num,
                            RedirectAttributes ra) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId, num);
        ra.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,Model model){
        //重定向到成功页面，再次查询购物车
        CartItem cartItem=cartService.getCartItem(skuId);
        model.addAttribute("item",cartItem);
        return "success";
    }

}
